OTP 24.2 is released

OTP 24.2

Erlang/OTP 24.2 is the second maintenance patch release for OTP 24, with mostly
bug fixes as well as a few improvements.

Below are some highlights of the release:


  • crypto: The crypto app in OTP can now be compiled, linked and
    used with the new OpenSSL 3.0 cryptolib. It has not yet been extensively tested,
    so only recommended for experiments and alpha testing in this release.
    There are not yet any guaranties that it works, not even together with other
    OTP applications like for example SSL and SSH, although
    there are no known errors.

  • erts: An option for enabling dirty scheduler specific
    allocator instances has been introduced. By default
    such allocator instances are disabled. For more
    information see the documentation of the +Mdai argument
    to the erlcommand

  • erl_docgen, erts: All predefined types have been added to the erlang
    module together with documentation.
    Any reference to a predefined type now links to that
    documentation so that the user can view it.

  • erts: Responsiveness of processes executing on normal or low
    priority could suffer due to code purging or literal
    area removal on systems with a huge amount of
    processes. This since during these operations all
    processes on the system were scheduled for execution at
    once. The new solution is to limit the number of outstanding
    purge and copy requests to 2 times the number of schedulers as default

For more details about the new features and potential incompatibilities see

Online documentation can be browsed here:

The Erlang/OTP source can also be found at GitHub on the official Erlang repository,


This would seem an appropriate place to link to kerl: Easy building and installing of Erlang/OTP instances. Other means of installing Erlang are, of course, available but if you want the latest (or multiple versions) and don’t want to wait for your distro provider to catch up, kerl works very well.